Add 10 in-depth SEO-focused DevOps, security, and AI infra skills

infrastructure/local-ai/multi-tenant-llm-hosting/SKILL.md

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+---
+name: multi-tenant-llm-hosting
+description: Design secure, multi-tenant LLM hosting platforms with tenant isolation, quotas, billing attribution, noisy-neighbor protection, and per-tenant policy controls.
+license: MIT
+metadata:
+  author: devops-skills
+  version: "1.0"
+---
+
+# Multi-Tenant LLM Hosting
+
+Host many teams/customers on shared inference infrastructure without sacrificing security, performance, or cost governance.
+
+## Isolation Model
+
+- Strong tenant identity on every request
+- Per-tenant API keys and scoped model access
+- Namespace or workload isolation for high-risk tenants
+- Strict data retention and log partitioning controls
+
+## Noisy-Neighbor Controls
+
+- Per-tenant RPM/TPM limits
+- Concurrency caps and queue isolation
+- Fair scheduling with weighted priority classes
+- Backpressure and graceful degradation policies
+
+## Billing and Chargeback
+
+Track per-tenant:
+- prompt/completion/cached tokens,
+- model type and route,
+- latency and success rate,
+- cost with markup or internal transfer pricing.
+
+## Security Baseline
+
+- Encrypt data in transit and at rest.
+- Disallow cross-tenant cache leakage.
+- Restrict debug data access by role.
+- Audit all privileged administrative actions.
+
+## Operational Runbook
+
+1. Onboard tenant with policy template.
+2. Issue virtual key and quota profile.
+3. Validate observability and billing tags.
+4. Run tenant-specific load/safety tests.
+5. Enable production traffic with canary limits.
+
+## Related Skills
+
+- [llm-gateway](../../networking/llm-gateway/) - Key management and traffic routing
+- [llm-cost-optimization](../../../devops/ai/llm-cost-optimization/) - Cost controls and optimization tactics
+- [zero-trust](../../../security/network/zero-trust/) - Identity-centric network and access patterns